National Instruments NI 9246 Manuale utente

NI-9246

GETTING STARTED GUIDE

NI 9246

3-Channel, 20 Arms Continuous, 24-Bit, Analog

Input Module

This document explains how to connect to the NI 9246.

Note Before you begin, complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9246. The other components in the system might

not meet the same safety ratings. Refer to the

documentation for each component in the system to

determine the safety and EMC ratings for the entire

system.

Safety Guidelines

Operate the NI 9246 only as described in this document.

Caution Do not operate the NI 9246 in a manner not

specified in this document. Product misuse can result in

a hazard. You can compromise the safety protection

built into the product if the product is damaged in any

way. If the product is damaged, return it to NI for

repair.

2| ni.com | NI 9246 Getting Started Guide

Safety Guidelines for Hazardous Voltages

If hazardous voltages are connected to the device, take the

following precautions. A hazardous voltage is a voltage greater

than 42.4 Vpk voltage or 60 VDC to earth ground.

Caution Ensure that hazardous voltage wiring is

performed only by qualified personnel adhering to local

electrical standards.

Caution Do not mix hazardous voltage circuits and

human-accessible circuits on the same module.

Caution Ensure that devices and circuits connected to

the module are properly insulated from human contact.

Caution When module terminals are hazardous

voltage LIVE (>42.4 Vpk/60 VDC), you must ensure

that devices and circuits connected to the module are

properly insulated from human contact.

NI 9246 Getting Started Guide | © National Instruments | 3

Safety Voltages

Connect only voltages that are within the following limits:

Maximum working voltage,

channel-to-earth ground

Continuous

...........................................

Up to 2,000 m

altitude

300 Vrms, Measurement

Category III

...........................................Up to 5,000 m

altitude

150 Vrms, Measurement

Category III or 300 Vrms,

Measurement Category II

Maximum working voltage,

channel-to-channel

Continuous

...........................................

Up to 2,000 m

altitude

480 Vrms, Measurement

Category III

...........................................Up to 5,000 m

altitude

300 Vrms, Measurement

Category III or 480 Vrms,

Measurement Category II

4| ni.com | NI 9246 Getting Started Guide

Withstand

...................................................Channel-to-channel 3510 Vrms, verified by a 5 s

dielectric withstand test

...................................................Channel-to-earth

ground

3510 Vrms, verified by a 5 s

dielectric withstand test

Measurement Category II is for measurements performed on

circuits directly connected to the electrical distribution system.

This category refers to local-level electrical distribution, such as

that provided by a standard wall outlet, for example, 115 V for

U.S. or 230 V for Europe.

Measurement Category III is for measurements performed in the

building installation at the distribution level. This category refers

to measurements on hard-wired hardware such as hardware in

fixed installations, distribution boards, and circuit breakers. Other

examples are wiring, including cables, bus bars, junction boxes,

switches, socket outlets in the fixed installation, and stationary

motors with permanent connections to fixed installations.

Caution Do not connect the NI 9246 to signals or use

for measurements within Measurement Category IV.

NI 9246 Getting Started Guide | © National Instruments | 5

Caution The NI 9246 ships with a connector

backshell to ensure that the terminals are not

accessible. Do not operate the device without first

installing this backshell.

6| ni.com | NI 9246 Getting Started Guide

Figure 1. NI 9246 with Backshell

Related Information

Installing the NI 9246 Backshell on page 14

NI 9246 Getting Started Guide | © National Instruments | 7

Electromagnetic Compatibility Guidelines

This product was tested and complies with the regulatory

requirements and limits for electromagnetic compatibility (EMC)

stated in the product specifications. These requirements and

limits provide reasonable protection against harmful interference

when the product is operated in the intended operational

electromagnetic environment.

This product is intended for use in industrial locations. However,

harmful interference may occur in some installations, when the

product is connected to a peripheral device or test object, or if the

product is used in residential or commercial areas. To minimize

interference with radio and television reception and prevent

unacceptable performance degradation, install and use this

product in strict accordance with the instructions in the product

documentation.

Furthermore, any changes or modifications to the product not

expressly approved by National Instruments could void your

authority to operate it under your local regulatory rules.

8| ni.com | NI 9246 Getting Started Guide

Special Conditions for Marine Applications

Some products are Lloyd’s Register (LR) Type Approved for

marine (shipboard) applications. To verify Lloyd’s Register

certification for a product, visit ni.com/certification and search

for the LR certificate, or look for the Lloyd’s Register mark on

the product.

Caution In order to meet the EMC requirements for

marine applications, install the product in a shielded

enclosure with shielded and/or filtered power and

input/output ports. In addition, take precautions when

designing, selecting, and installing measurement probes

and cables to ensure that the desired EMC performance

is attained.

NI 9246 Getting Started Guide | © National Instruments | 9

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